'Horsehead' definitions:

Definition of 'horsehead'

From: WordNet
noun
Any of several silvery marine fishes with very flat bodies [syn: moonfish, Atlantic moonfish, horsefish, horsehead, horse-head, dollarfish, Selene setapinnis]

Definition of 'Horsehead'

From: GCIDE
  • Horsehead \Horse"head`\, n. (Zool.) The silver moonfish (Selene vomer). [1913 Webster]